| 摘要 |
Portable device for controlling the switching on and off of one or more electrical circuits, composed of a casing 1 enclosing a cell 2, an oscillation device 4 and tuned lines 5, 6 and 7, taking the form of a printed circuit, an operating button 9 and an encoder 14. The plastic casing 1 is surmounted by a metal top or cap 11 serving as transmission antenna. An antenna coupling line 6 is placed at the upper edge of the support plate of the printed circuit 3. The lower face of the cap 11 is provided with a groove 12 transverse to the plane of the cap, so that the antenna coupling line 6 becomes housed in the groove and is held in electrical contact with the latter. The button 9 possesses a manual control end which emerges from the cap 11 so that manual contacting of the metal cap is produced simultaneously with the touching of the button 9, thus amplifying the antenna effect. Makes it possible to avoid the bulkiness of a whip antenna or of an antenna arranged inside the casing. <IMAGE>
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